diff --git a/db.sql b/db.sql
index c8afb68..b1afb07 100644
--- a/db.sql
+++ b/db.sql
@@ -179,22 +179,22 @@ CREATE TABLE `t_order` (
 ) COMMENT='订单表';
 
 CREATE TABLE `t_order_file` (
-  `Id` INT NOT NULL AUTO_INCREMENT,
+  `Id` INT NOT NULL AUTO_INCREMENT COMMENT '主键，自增',
   `OrderId` INT NOT NULL COMMENT '订单Id',
-  `FileType` VARCHAR(32) NOT NULL COMMENT 'tradeProof/systemLabel/downstreamLabel/lastMileLabel/infraredImage',
+  `FileType` VARCHAR(32) NOT NULL COMMENT '附件类型：tradeProof交易证明/systemLabel系统面单/downstreamLabel下游面单/lastMileLabel末端面单/infraredImage红外图片',
   `FileName` VARCHAR(255) NULL COMMENT '原始文件名',
-  `FileUrl` VARCHAR(512) NOT NULL COMMENT '相对路径或外链',
-  `ContentType` VARCHAR(128) NULL,
-  `FileSize` BIGINT NULL,
-  `Sort` INT NOT NULL DEFAULT 0,
-  `Source` VARCHAR(32) NOT NULL DEFAULT 'upload' COMMENT 'upload/systemGenerate/downstream/migrate',
-  `Remark` VARCHAR(512) NULL,
-  `IsDeleted` TINYINT NOT NULL DEFAULT 0,
-  `ConcurrencyStamp` CHAR(36) NOT NULL DEFAULT (UUID()),
-  `CreateUserId` INT NOT NULL DEFAULT 0,
-  `CreateTime` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
-  `UpdateUserId` INT NULL,
-  `UpdateTime` DATETIME NULL,
+  `FileUrl` VARCHAR(512) NOT NULL COMMENT '文件地址（相对路径或外链）',
+  `ContentType` VARCHAR(128) NULL COMMENT '文件MIME类型',
+  `FileSize` BIGINT NULL COMMENT '文件大小（字节）',
+  `Sort` INT NOT NULL DEFAULT 0 COMMENT '同类型内排序',
+  `Source` VARCHAR(32) NOT NULL DEFAULT 'upload' COMMENT '来源：upload上传/systemGenerate系统生成/downstream下游回传/migrate迁移',
+  `Remark` VARCHAR(512) NULL COMMENT '备注',
+  `IsDeleted` TINYINT NOT NULL DEFAULT 0 COMMENT '软删除：0-否，1-是',
+  `ConcurrencyStamp` CHAR(36) NOT NULL DEFAULT (UUID()) COMMENT '并发戳',
+  `CreateUserId` INT NOT NULL DEFAULT 0 COMMENT '创建人',
+  `CreateTime` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  `UpdateUserId` INT NULL COMMENT '更新人',
+  `UpdateTime` DATETIME NULL COMMENT '更新时间',
   PRIMARY KEY (`Id`),
   KEY `idx_ord_file_order_type` (`OrderId`, `FileType`, `IsDeleted`)
 ) COMMENT='订单附件表';
diff --git a/sql/20260728_order_file.sql b/sql/20260728_order_file.sql
index 79d7970..1e94b5f 100644
--- a/sql/20260728_order_file.sql
+++ b/sql/20260728_order_file.sql
@@ -1,28 +1,28 @@
--- Order files table + migrate LabelUrl into systemLabel, then drop legacy columns.
--- Run on MySQL. Backup first.
+-- 订单附件表；将原 LabelUrl 迁移为 systemLabel 后删除订单旧面单字段。
+-- 在 MySQL 执行前请先备份。
 
 CREATE TABLE IF NOT EXISTS `t_order_file` (
-  `Id` INT NOT NULL AUTO_INCREMENT,
-  `OrderId` INT NOT NULL COMMENT 'Order Id',
-  `FileType` VARCHAR(32) NOT NULL COMMENT 'tradeProof/systemLabel/downstreamLabel/lastMileLabel/infraredImage',
-  `FileName` VARCHAR(255) NULL COMMENT 'Original file name',
-  `FileUrl` VARCHAR(512) NOT NULL COMMENT 'Relative or absolute URL',
-  `ContentType` VARCHAR(128) NULL,
-  `FileSize` BIGINT NULL,
-  `Sort` INT NOT NULL DEFAULT 0,
-  `Source` VARCHAR(32) NOT NULL DEFAULT 'upload' COMMENT 'upload/systemGenerate/downstream/migrate',
-  `Remark` VARCHAR(512) NULL,
-  `IsDeleted` TINYINT NOT NULL DEFAULT 0,
-  `ConcurrencyStamp` CHAR(36) NOT NULL DEFAULT (UUID()),
-  `CreateUserId` INT NOT NULL DEFAULT 0,
-  `CreateTime` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
-  `UpdateUserId` INT NULL,
-  `UpdateTime` DATETIME NULL,
+  `Id` INT NOT NULL AUTO_INCREMENT COMMENT '主键，自增',
+  `OrderId` INT NOT NULL COMMENT '订单Id',
+  `FileType` VARCHAR(32) NOT NULL COMMENT '附件类型：tradeProof交易证明/systemLabel系统面单/downstreamLabel下游面单/lastMileLabel末端面单/infraredImage红外图片',
+  `FileName` VARCHAR(255) NULL COMMENT '原始文件名',
+  `FileUrl` VARCHAR(512) NOT NULL COMMENT '文件地址（相对路径或外链）',
+  `ContentType` VARCHAR(128) NULL COMMENT '文件MIME类型',
+  `FileSize` BIGINT NULL COMMENT '文件大小（字节）',
+  `Sort` INT NOT NULL DEFAULT 0 COMMENT '同类型内排序',
+  `Source` VARCHAR(32) NOT NULL DEFAULT 'upload' COMMENT '来源：upload上传/systemGenerate系统生成/downstream下游回传/migrate迁移',
+  `Remark` VARCHAR(512) NULL COMMENT '备注',
+  `IsDeleted` TINYINT NOT NULL DEFAULT 0 COMMENT '软删除：0-否，1-是',
+  `ConcurrencyStamp` CHAR(36) NOT NULL DEFAULT (UUID()) COMMENT '并发戳',
+  `CreateUserId` INT NOT NULL DEFAULT 0 COMMENT '创建人',
+  `CreateTime` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  `UpdateUserId` INT NULL COMMENT '更新人',
+  `UpdateTime` DATETIME NULL COMMENT '更新时间',
   PRIMARY KEY (`Id`),
   KEY `idx_ord_file_order_type` (`OrderId`, `FileType`, `IsDeleted`)
-) COMMENT='Order attachment files';
+) COMMENT='订单附件表';
 
--- Migrate existing system label URL (ignore if column already dropped)
+-- 迁移已有系统面单地址（若 LabelUrl 列已删除可跳过本段）
 INSERT INTO `t_order_file` (`OrderId`, `FileType`, `FileName`, `FileUrl`, `ContentType`, `Sort`, `Source`, `CreateUserId`, `CreateTime`)
 SELECT
   `Id`,
diff --git a/sql/20260728_order_file_comments.sql b/sql/20260728_order_file_comments.sql
new file mode 100644
index 0000000..1934c3c
--- /dev/null
+++ b/sql/20260728_order_file_comments.sql
@@ -0,0 +1,20 @@
+-- 若 t_order_file 已按英文注释建表，执行本脚本改为中文注释（不改结构）。
+
+ALTER TABLE `t_order_file`
+  MODIFY COLUMN `Id` INT NOT NULL AUTO_INCREMENT COMMENT '主键，自增',
+  MODIFY COLUMN `OrderId` INT NOT NULL COMMENT '订单Id',
+  MODIFY COLUMN `FileType` VARCHAR(32) NOT NULL COMMENT '附件类型：tradeProof交易证明/systemLabel系统面单/downstreamLabel下游面单/lastMileLabel末端面单/infraredImage红外图片',
+  MODIFY COLUMN `FileName` VARCHAR(255) NULL COMMENT '原始文件名',
+  MODIFY COLUMN `FileUrl` VARCHAR(512) NOT NULL COMMENT '文件地址（相对路径或外链）',
+  MODIFY COLUMN `ContentType` VARCHAR(128) NULL COMMENT '文件MIME类型',
+  MODIFY COLUMN `FileSize` BIGINT NULL COMMENT '文件大小（字节）',
+  MODIFY COLUMN `Sort` INT NOT NULL DEFAULT 0 COMMENT '同类型内排序',
+  MODIFY COLUMN `Source` VARCHAR(32) NOT NULL DEFAULT 'upload' COMMENT '来源：upload上传/systemGenerate系统生成/downstream下游回传/migrate迁移',
+  MODIFY COLUMN `Remark` VARCHAR(512) NULL COMMENT '备注',
+  MODIFY COLUMN `IsDeleted` TINYINT NOT NULL DEFAULT 0 COMMENT '软删除：0-否，1-是',
+  MODIFY COLUMN `ConcurrencyStamp` CHAR(36) NOT NULL DEFAULT (UUID()) COMMENT '并发戳',
+  MODIFY COLUMN `CreateUserId` INT NOT NULL DEFAULT 0 COMMENT '创建人',
+  MODIFY COLUMN `CreateTime` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  MODIFY COLUMN `UpdateUserId` INT NULL COMMENT '更新人',
+  MODIFY COLUMN `UpdateTime` DATETIME NULL COMMENT '更新时间',
+  COMMENT='订单附件表';
diff --git a/src/Oms.Application/Dtos/Orders/OrderParcelDraftFailData.cs b/src/Oms.Application/Dtos/Orders/OrderParcelDraftFailData.cs
new file mode 100644
index 0000000..d7bc198
--- /dev/null
+++ b/src/Oms.Application/Dtos/Orders/OrderParcelDraftFailData.cs
@@ -0,0 +1,35 @@
+namespace Oms.Application.Dtos.Orders;
+
+/// <summary>
+/// 小包创建/草稿预报失败且已落库时的结构化错误载荷（写入异常 Data / 响应 Details）。
+/// </summary>
+public class OrderParcelDraftFailData
+{
+    public const string ErrorCodeValue = "OMS_DRAFT_SAVED";
+    public const string DataKey = "omsDraftFail";
+
+    /// <summary>
+    /// 是否已保存为草稿。
+    /// </summary>
+    public bool DraftSaved { get; set; } = true;
+
+    /// <summary>
+    /// 订单主键。
+    /// </summary>
+    public int OrderId { get; set; }
+
+    /// <summary>
+    /// 运单号。
+    /// </summary>
+    public string ServiceNo { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 干净失败原因（不含机器标记）。
+    /// </summary>
+    public string Reason { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 稳定错误码，供前端识别。
+    /// </summary>
+    public string ErrorCode { get; set; } = ErrorCodeValue;
+}
diff --git a/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs b/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
index d4e9afe..7d93f8f 100644
--- a/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.ParcelBilling.cs
@@ -181,16 +181,86 @@ public partial class OrderService
         }
         catch (BusinessException ex)
         {
-            await MarkParcelDraftFailedAsync(order, ex.Message);
-            throw;
+            var cleanReason = StripDraftSavedMarker(ex.Message);
+            await MarkParcelDraftFailedAsync(order, cleanReason);
+            throw CreateDraftSavedBusinessException(order, cleanReason);
         }
         catch (Exception ex)
         {
-            await MarkParcelDraftFailedAsync(order, ex.Message);
-            throw new BusinessException(ex.Message);
+            var cleanReason = StripDraftSavedMarker(ex.Message);
+            await MarkParcelDraftFailedAsync(order, cleanReason);
+            throw CreateDraftSavedBusinessException(order, cleanReason);
         }
     }
 
+    /// <summary>
+    /// 草稿已落库失败时，在业务文案末尾附加机器可读标记，供前端区分「未落库 / 已存草稿」。
+    /// 格式：原因 [[omsDraft:{"draftSaved":true,"orderId":1,"serviceNo":"IDE..."}]]
+    /// 同时写入 Exception.Data / ErrorCode，由 OmsException2ResponseConverter 输出到响应 Details。
+    /// </summary>
+    private const string DraftSavedMarkerPrefix = " [[omsDraft:";
+    private const string DraftSavedMarkerSuffix = "]]";
+
+    private static string StripDraftSavedMarker(string? message)
+    {
+        if (string.IsNullOrEmpty(message))
+        {
+            return string.Empty;
+        }
+
+        var idx = message.IndexOf(DraftSavedMarkerPrefix, StringComparison.Ordinal);
+        return idx < 0 ? message : message[..idx].TrimEnd();
+    }
+
+    private static string WrapDraftSavedFail(Order order, string reason)
+    {
+        var clean = StripDraftSavedMarker(reason);
+        if (string.IsNullOrWhiteSpace(clean))
+        {
+            clean = "预报未完成";
+        }
+
+        var payload = global::System.Text.Json.JsonSerializer.Serialize(new Dictionary<string, object>
+        {
+            ["draftSaved"] = true,
+            ["orderId"] = order.Id,
+            ["serviceNo"] = order.ServiceNo ?? string.Empty,
+            ["reason"] = clean,
+            ["errorCode"] = OrderParcelDraftFailData.ErrorCodeValue,
+        });
+        return $"{clean}{DraftSavedMarkerPrefix}{payload}{DraftSavedMarkerSuffix}";
+    }
+
+    /// <summary>
+    /// 抛出「草稿已落库」业务异常：ErrorCode + Data 结构化载荷，msg 仍带兼容标记。
+    /// </summary>
+    private static BusinessException CreateDraftSavedBusinessException(Order order, string reason)
+    {
+        var clean = StripDraftSavedMarker(reason);
+        if (string.IsNullOrWhiteSpace(clean))
+        {
+            clean = "预报未完成";
+        }
+
+        var failData = new OrderParcelDraftFailData
+        {
+            DraftSaved = true,
+            OrderId = order.Id,
+            ServiceNo = order.ServiceNo ?? string.Empty,
+            Reason = clean,
+            ErrorCode = OrderParcelDraftFailData.ErrorCodeValue,
+        };
+
+        var ex = new BusinessException(WrapDraftSavedFail(order, clean));
+        ex.ErrorCode = OrderParcelDraftFailData.ErrorCodeValue;
+        ex.Data["draftSaved"] = true;
+        ex.Data["orderId"] = order.Id;
+        ex.Data["serviceNo"] = order.ServiceNo ?? string.Empty;
+        ex.Data[OrderParcelDraftFailData.DataKey] =
+            global::System.Text.Json.JsonSerializer.Serialize(failData);
+        return ex;
+    }
+
     private const string ParcelServiceNoPrefix = "IDE";
 
     /// <summary>
@@ -1536,6 +1606,106 @@ public partial class OrderService
         throw new BusinessException("运单号生成失败");
     }
 
+    /// <summary>
+    /// 草稿重新预报：按订单当前收件/件重尺/快照重跑黑名单、计重、分区与预报应收。
+    /// 失败时保持草稿并写入 PredeclareFailReason。
+    /// </summary>
+    internal async Task CompleteDraftPredeclareAsync(Order order, int? operatorUserId = null)
+    {
+        if (string.IsNullOrWhiteSpace(order.ProductCode))
+        {
+            throw new BusinessException("订单未绑定销售产品，无法预报");
+        }
+
+        var product = await SalesProductRepository.GetByProductCodeAsync(order.ProductCode.Trim());
+        if (product == null || product.IsActive != EnableStatus.Enabled)
+        {
+            throw new BusinessException("销售产品不存在或未启用");
+        }
+
+        try
+        {
+            var snapshotBinding = await ResolveSnapshotBindingFromOrderAsync(product, order);
+            var address = await ResolveOrderBillingAddressAsync(order);
+
+            if (await IsBlacklistHitAsync(
+                    product,
+                    snapshotBinding.Rules,
+                    address.CountryCode,
+                    address.Province,
+                    address.City,
+                    address.ZipCode))
+            {
+                throw new BusinessException("收件地址命中黑名单区域");
+            }
+
+            order.IsRemote = await IsRemoteHitAsync(
+                product,
+                snapshotBinding.Rules,
+                address.CountryCode,
+                address.Province,
+                address.City,
+                address.ZipCode) ? (byte)1 : (byte)0;
+
+            var weights = (await OrderRepository.GetWeightsByOrderIdsAsync([order.Id]))
+                .OrderBy(x => x.Id)
+                .ToList();
+            var forecast = weights.FirstOrDefault(x =>
+                                 string.Equals(x.Type, OrderWeightTypeCodes.Forecast, StringComparison.OrdinalIgnoreCase))
+                           ?? throw new BusinessException("订单缺少预报件重尺");
+
+            await ApplyChargeableWeightAsync(product, snapshotBinding.Rules, forecast);
+            SyncWeightRows(weights, forecast);
+            await OrderRepository.ReplaceWeightsAsync(order.Id, weights);
+
+            var billing = await ResolveOrderBillingContextAsync(
+                order,
+                product,
+                forecast.ChargeableWeight ?? 0,
+                snapshotBinding);
+
+            await UpsertReceivableFeesAsync(
+                order,
+                billing,
+                OrderFeeChargingStageCodes.Forecast,
+                replaceExistingReceivable: true);
+
+            order.OrderStatus = OrderStatusCodes.Predeclared;
+            order.PredeclareFailReason = string.Empty;
+            order.AllocationPendingReason = string.Empty;
+            order.UpdateTime = DateTime.Now;
+            await OrderRepository.UpdateAsync(order);
+
+            var customer = order.CustomerId.HasValue
+                ? await CustomerRepository.FirstOrDefaultAsync(x => x.Id == order.CustomerId.Value)
+                : null;
+            await EnqueueSmallBagTrackUpsertAsync(order, customer, receiver: null, appendInitialTrack: true);
+            await EnqueueGenerateLabelPdfAsync(order);
+
+            try
+            {
+                var triggerUserId = operatorUserId ?? CurrentUser.GetId<int>();
+                await AutoTriggerRuntimeService.FireAsync(order, AutoTriggerTiming.OrderCreate, triggerUserId);
+            }
+            catch
+            {
+                // 自动触发失败不影响预报主流程
+            }
+        }
+        catch (BusinessException ex)
+        {
+            var cleanReason = StripDraftSavedMarker(ex.Message);
+            await MarkParcelDraftFailedAsync(order, cleanReason);
+            throw CreateDraftSavedBusinessException(order, cleanReason);
+        }
+        catch (Exception ex)
+        {
+            var cleanReason = StripDraftSavedMarker(ex.Message);
+            await MarkParcelDraftFailedAsync(order, cleanReason);
+            throw CreateDraftSavedBusinessException(order, cleanReason);
+        }
+    }
+
     private async Task MarkParcelDraftFailedAsync(Order order, string reason)
     {
         order.OrderStatus = OrderStatusCodes.Draft;
diff --git a/src/Oms.Application/Services/Orders/OrderService.cs b/src/Oms.Application/Services/Orders/OrderService.cs
index b8c8424..14f753e 100644
--- a/src/Oms.Application/Services/Orders/OrderService.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.cs
@@ -193,8 +193,18 @@ public partial class OrderService : ApplicationService
     public async Task PreDeclareAsync(OrderActionInput input)
     {
         var order = await GetOrderOrThrowAsync(input.Id);
-        order.OrderStatus = OrderStatusCodes.Predeclared;
-        await UpdateOrderAsync(order);
+        if (string.Equals(order.OrderStatus, OrderStatusCodes.Predeclared, StringComparison.OrdinalIgnoreCase))
+        {
+            return;
+        }
+
+        if (!string.Equals(order.OrderStatus, OrderStatusCodes.Draft, StringComparison.OrdinalIgnoreCase))
+        {
+            throw new BusinessException(
+                $"订单状态为「{OmsDocHelper.GetOrderStatusName(order.OrderStatus)}」，不允许预报");
+        }
+
+        await CompleteDraftPredeclareAsync(order);
     }
 
     /// <summary>
diff --git a/src/SimpleAdmin.Api/ExceptionHandling/OmsException2ResponseConverter.cs b/src/SimpleAdmin.Api/ExceptionHandling/OmsException2ResponseConverter.cs
new file mode 100644
index 0000000..576a3b2
--- /dev/null
+++ b/src/SimpleAdmin.Api/ExceptionHandling/OmsException2ResponseConverter.cs
@@ -0,0 +1,141 @@
+using System.Collections;
+using Fake.Application;
+using Fake.Application.Dtos;
+using Fake.AspNetCore.ExceptionHandling;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Serialization;
+using Oms.Application.Dtos.Orders;
+
+namespace SimpleAdmin.Api.ExceptionHandling;
+
+/// <summary>
+/// 在 Fake 默认异常转换之上，把草稿已落库失败的结构化信息写入 Details，并清理 msg 中的机器标记。
+/// </summary>
+public class OmsException2ResponseConverter : IException2ResponseConverter
+{
+    private static readonly JsonSerializerSettings JsonSettings = new()
+    {
+        ContractResolver = new CamelCasePropertyNamesContractResolver(),
+        NullValueHandling = NullValueHandling.Ignore,
+    };
+
+    private const string DraftSavedMarkerPrefix = " [[omsDraft:";
+
+    private readonly DefaultException2ResponseConverter _inner;
+
+    public OmsException2ResponseConverter(DefaultException2ResponseConverter inner)
+    {
+        _inner = inner;
+    }
+
+    public ApplicationExceptionResponse Convert(Exception exception, FakeExceptionHandlingOptions options)
+    {
+        var response = _inner.Convert(exception, options);
+        response.Message = StripDraftSavedMarker(response.Message);
+
+        if (TryBuildDraftFailData(exception, out var failData))
+        {
+            if (string.IsNullOrWhiteSpace(response.Message))
+            {
+                response.Message = failData.Reason;
+            }
+
+            response.Details = JsonConvert.SerializeObject(failData, JsonSettings);
+        }
+
+        return response;
+    }
+
+    private static bool TryBuildDraftFailData(Exception exception, out OrderParcelDraftFailData failData)
+    {
+        failData = new OrderParcelDraftFailData();
+        if (exception is not BusinessException business)
+        {
+            return false;
+        }
+
+        if (business.Data[OrderParcelDraftFailData.DataKey] is string json
+            && !string.IsNullOrWhiteSpace(json))
+        {
+            try
+            {
+                var parsed = JsonConvert.DeserializeObject<OrderParcelDraftFailData>(json);
+                if (parsed != null && parsed.DraftSaved && parsed.OrderId > 0)
+                {
+                    failData = parsed;
+                    return true;
+                }
+            }
+            catch
+            {
+                // fall through to key-based parse
+            }
+        }
+
+        if (!HasDraftSavedFlag(business.Data))
+        {
+            // 兼容旧客户端：仅从 message 尾部标记解析
+            return TryParseMarker(business.Message, out failData);
+        }
+
+        failData.DraftSaved = true;
+        failData.OrderId = ToInt(business.Data["orderId"] ?? business.Data["OrderId"]);
+        failData.ServiceNo = ToStringValue(business.Data["serviceNo"] ?? business.Data["ServiceNo"]);
+        failData.Reason = StripDraftSavedMarker(business.Message);
+        failData.ErrorCode = OrderParcelDraftFailData.ErrorCodeValue;
+        return failData.OrderId > 0;
+    }
+
+    private static bool HasDraftSavedFlag(IDictionary data)
+    {
+        if (data.Contains("draftSaved") && IsTruthy(data["draftSaved"])) return true;
+        if (data.Contains("DraftSaved") && IsTruthy(data["DraftSaved"])) return true;
+        return false;
+    }
+
+    private static bool TryParseMarker(string? message, out OrderParcelDraftFailData failData)
+    {
+        failData = new OrderParcelDraftFailData();
+        if (string.IsNullOrEmpty(message)) return false;
+        var idx = message.IndexOf(DraftSavedMarkerPrefix, StringComparison.Ordinal);
+        if (idx < 0) return false;
+        var jsonStart = idx + DraftSavedMarkerPrefix.Length;
+        var jsonEnd = message.LastIndexOf("]]", StringComparison.Ordinal);
+        if (jsonEnd <= jsonStart) return false;
+        try
+        {
+            var parsed = JsonConvert.DeserializeObject<OrderParcelDraftFailData>(message[jsonStart..jsonEnd]);
+            if (parsed == null || !parsed.DraftSaved || parsed.OrderId <= 0) return false;
+            parsed.Reason = message[..idx].TrimEnd();
+            parsed.ErrorCode = OrderParcelDraftFailData.ErrorCodeValue;
+            failData = parsed;
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    private static string StripDraftSavedMarker(string? message)
+    {
+        if (string.IsNullOrEmpty(message)) return string.Empty;
+        var idx = message.IndexOf(DraftSavedMarkerPrefix, StringComparison.Ordinal);
+        return idx < 0 ? message : message[..idx].TrimEnd();
+    }
+
+    private static bool IsTruthy(object? value) =>
+        value is true
+        || (value is bool b && b)
+        || string.Equals(global::System.Convert.ToString(value), "true", StringComparison.OrdinalIgnoreCase)
+        || string.Equals(global::System.Convert.ToString(value), "1", StringComparison.OrdinalIgnoreCase);
+
+    private static int ToInt(object? value)
+    {
+        if (value == null) return 0;
+        return int.TryParse(global::System.Convert.ToString(value), out var n) ? n : 0;
+    }
+
+    private static string ToStringValue(object? value) =>
+        global::System.Convert.ToString(value)?.Trim() ?? string.Empty;
+}
diff --git a/src/SimpleAdmin.Api/SimpleAdminApiModule.cs b/src/SimpleAdmin.Api/SimpleAdminApiModule.cs
index 9cad2cb..9ae4d2c 100644
--- a/src/SimpleAdmin.Api/SimpleAdminApiModule.cs
+++ b/src/SimpleAdmin.Api/SimpleAdminApiModule.cs
@@ -101,6 +101,20 @@ public class SimpleAdminApiModule : FakeModule
         });
         
         services.AddFeiShuExceptionSubscriber();
+
+        // 草稿已落库失败：结构化 Details + 清理 msg 机器标记
+        services.AddTransient<DefaultException2ResponseConverter>();
+        var exceptionConverterDescriptors = services
+            .Where(d => d.ServiceType == typeof(IException2ResponseConverter))
+            .ToList();
+        foreach (var descriptor in exceptionConverterDescriptors)
+        {
+            services.Remove(descriptor);
+        }
+
+        services.AddTransient<IException2ResponseConverter>(sp =>
+            new ExceptionHandling.OmsException2ResponseConverter(
+                sp.GetRequiredService<DefaultException2ResponseConverter>()));
     }
 
     public override void ConfigureApplication(ApplicationConfigureContext context)